LONDON (Reuters) - Uncertainty over a U.S. tax reform deal pushed world stock markets further away from recent record highs on Monday, while Britain's pound fell on growing concern about the future of Prime Minister Theresa May.

LONDON (Reuters) - Uncertainty over a U.S. tax reform deal pushed world stock markets further away from recent record highs on Monday, while Britain's pound fell on growing concern about the future of Prime Minister Theresa May.